So, here it is, the big day you’ve read about: 29 March, the date the UK breaks a 46-year alliance with the European Union. No doubt, if it actually goes ahead, there will be laughs and there will be tears. There will also be an exhibition. Timed to coincide with Brexit, the country’s foremost photographer and visual wit, Martin Parr, opens what’s been billed as the biggest survey of his work since 2002. On display at the National Portrait Gallery, London Only Human (7 March – 27 May) is a kind of behind-the-scenes exploration of Britishness today. As curator Phillip Prodger writes in the accompanying book, this mix of portraits of “ordinary people” (the original name of the exhibition), reveals the country as it was “never intended to be seen”. Oh, the irony.